20471380

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1\times {\mathrm{233}}^1$

素因数の和:456

約数の個数: 48

約数和(自身を含む): 45287424

約数和(自身を除く): 24816044

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 191, 230, 233, 382, 460, 466, 764, 932, 955, 1165, 1910, 2330, 3820, 4393, 4660, 5359, 8786, 10718, 17572, 21436, 21965, 26795, 43930, 44503, 53590, 87860, 89006, 107180, 178012, 222515, 445030, 890060, 1023569, 2047138, 4094276, 5117845, 10235690, 20471380]

約数ペア:

[(1, 20471380), (2, 10235690), (4, 5117845), (5, 4094276), (10, 2047138), (20, 1023569), (23, 890060), (46, 445030), (92, 222515), (115, 178012), (191, 107180), (230, 89006), (233, 87860), (382, 53590), (460, 44503), (466, 43930), (764, 26795), (932, 21965), (955, 21436), (1165, 17572), (1910, 10718), (2330, 8786), (3820, 5359), (4393, 4660)]